Polar tropospheric ozone depletion events observed in the International Geophysical Year of 1958
International audience The Royal Society expedition to Antarctica established a base at Halley Bay, in support of the International Geophysical Year of 1957?1958. Surface ozone was measured during 1958 only, using a prototype Brewer-Mast sonde. The envelope of maximum ozone was an annual cycle from...
Main Authors: | , |
---|---|
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2006
|
Subjects: | |
Online Access: | https://hal.science/hal-00296001 https://hal.science/hal-00296001/document https://hal.science/hal-00296001/file/acp-6-3303-2006.pdf |
id |
ftccsdartic:oai:HAL:hal-00296001v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-00296001v1 2023-11-12T04:07:28+01:00 Polar tropospheric ozone depletion events observed in the International Geophysical Year of 1958 Roscoe, H. K. Roscoe, J. British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 2006-08-10 https://hal.science/hal-00296001 https://hal.science/hal-00296001/document https://hal.science/hal-00296001/file/acp-6-3303-2006.pdf en eng HAL CCSD European Geosciences Union hal-00296001 https://hal.science/hal-00296001 https://hal.science/hal-00296001/document https://hal.science/hal-00296001/file/acp-6-3303-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00296001 Atmospheric Chemistry and Physics, 2006, 6 (11), pp.3303-3314 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2006 ftccsdartic 2023-10-21T23:17:19Z International audience The Royal Society expedition to Antarctica established a base at Halley Bay, in support of the International Geophysical Year of 1957?1958. Surface ozone was measured during 1958 only, using a prototype Brewer-Mast sonde. The envelope of maximum ozone was an annual cycle from 10 ppbv in January to 22 ppbv in August. These values are 35% less at the start of the year and 15% less at the end than modern values from Neumayer, also a coastal site. This may reflect a general increase in surface ozone since 1958 and differences in summer at the less windy site of Halley, or it may reflect ozone loss on the inlet together with long-term conditioning. There were short periods in September when ozone values decreased rapidly to near-zero, and some in August when ozone values were rapidly halved. Such ozone-loss episodes, catalysed by bromine compounds, became well-known in the Artic in the 1980s, and were observed more recently in the Antarctic. In 1958, very small ozone values were recorded for a week in midwinter during clear weather with light winds. The absence of similar midwinter reductions at Neumayer, or at Halley in the few measurements during 1987, means we must remain suspicious of these small values, but we can find no obvious reason to discount them. The dark reaction of ozone and seawater ice observed in the laboratory may be fast enough to explain them if the salinity and surface area of the ice is sufficiently amplified by frost flowers. Article in Journal/Newspaper Antarc* Antarctic Antarctica Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic Neumayer Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Roscoe, H. K. Roscoe, J. Polar tropospheric ozone depletion events observed in the International Geophysical Year of 1958 |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The Royal Society expedition to Antarctica established a base at Halley Bay, in support of the International Geophysical Year of 1957?1958. Surface ozone was measured during 1958 only, using a prototype Brewer-Mast sonde. The envelope of maximum ozone was an annual cycle from 10 ppbv in January to 22 ppbv in August. These values are 35% less at the start of the year and 15% less at the end than modern values from Neumayer, also a coastal site. This may reflect a general increase in surface ozone since 1958 and differences in summer at the less windy site of Halley, or it may reflect ozone loss on the inlet together with long-term conditioning. There were short periods in September when ozone values decreased rapidly to near-zero, and some in August when ozone values were rapidly halved. Such ozone-loss episodes, catalysed by bromine compounds, became well-known in the Artic in the 1980s, and were observed more recently in the Antarctic. In 1958, very small ozone values were recorded for a week in midwinter during clear weather with light winds. The absence of similar midwinter reductions at Neumayer, or at Halley in the few measurements during 1987, means we must remain suspicious of these small values, but we can find no obvious reason to discount them. The dark reaction of ozone and seawater ice observed in the laboratory may be fast enough to explain them if the salinity and surface area of the ice is sufficiently amplified by frost flowers. |
author2 |
British Antarctic Survey (BAS) Natural Environment Research Council (NERC) |
format |
Article in Journal/Newspaper |
author |
Roscoe, H. K. Roscoe, J. |
author_facet |
Roscoe, H. K. Roscoe, J. |
author_sort |
Roscoe, H. K. |
title |
Polar tropospheric ozone depletion events observed in the International Geophysical Year of 1958 |
title_short |
Polar tropospheric ozone depletion events observed in the International Geophysical Year of 1958 |
title_full |
Polar tropospheric ozone depletion events observed in the International Geophysical Year of 1958 |
title_fullStr |
Polar tropospheric ozone depletion events observed in the International Geophysical Year of 1958 |
title_full_unstemmed |
Polar tropospheric ozone depletion events observed in the International Geophysical Year of 1958 |
title_sort |
polar tropospheric ozone depletion events observed in the international geophysical year of 1958 |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00296001 https://hal.science/hal-00296001/document https://hal.science/hal-00296001/file/acp-6-3303-2006.pdf |
long_lat |
ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Antarctic The Antarctic Neumayer Midwinter |
geographic_facet |
Antarctic The Antarctic Neumayer Midwinter |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00296001 Atmospheric Chemistry and Physics, 2006, 6 (11), pp.3303-3314 |
op_relation |
hal-00296001 https://hal.science/hal-00296001 https://hal.science/hal-00296001/document https://hal.science/hal-00296001/file/acp-6-3303-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782328127177883648 |